I need a method to monitor user edit sessions, and one of the solutions I'm reviewing will have me using an unload event to send an ajax request to inform the server of the end of the edit session. (See: Monitoring User Sessions to Prevent Editing Conflict)
My (rather limited) reading on the unload event indicate that the codes attached to this handler has to run quickly, and as such is usually used for clearing objects to prevent memory leaks.
My question is, can this work reliably enough for this purpose?
PS. I know about the async: false option.